I am looking for a stock ECU file for a 2003 Audi RS6 (US version). I see several here but each has a different "software number". For example:
4d1907558 - 366304 (six digit number is the software number)
4d1907558 - 367724
Does it matter which one I use? I need to go back to stock software for a state inspection and they have been breaking my balls. I don't have the original file or any logs that show the software number.
Thanks
US RS6, chances are it shipped with this